Chapter 1 An Overview Of The Cisco Unified Ip Phone; Understanding The Cisco Unified Ip Phones 7960G And 7940G - Cisco 7940 - IP Phone VoIP Administration Manual

An Overview of the Cisco Unified IP Phone
The Cisco Unified IP Phone is a full-featured telephone that provides voice communication over an
Internet Protocol (IP) network. It functions much like a digital business phone, allowing you to place and
receive phone calls and to access features such as mute, hold, transfer, and speed dial. In addition,
because the phone is connected to your data network, it offers enhanced IP telephony features, including
access to network information and services, and customizeable features and services. The phone also
supports security features that include file authentication, device authentication, signaling encryption,
and media encryption.
This manual describes the Cisco Unified IP Phone 7960G and the Cisco Unified IP Phone 7940G.
A Cisco Unified IP Phone, like other network devices, must be configured and managed. These phones
encode G.711a, G.711u, G.729a, G.729ab, and decode G.711a, G.711u, G.729, G.729a, G.729b, and
G.729ab. These phones also support uncompressed wideband (16 bits, 16 kHz) audio.
This chapter includes the following topics:
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Using a mobile or GSM phone, or two-way radio in close proximity to a Cisco Unified IP Phone might
Caution
cause interference. For more information, refer to the manufacturer's documentation of the interfering
device.

Understanding the Cisco Unified IP Phones 7960G and 7940G

Figure 1-1
main components of the Cisco Unified IP Phone 7940G.
These phone models differ only in the number of available line or speed dial buttons. The
Cisco Unified IP Phone 7940G has two lines, and the 7960G has six lines.
Cisco Unified IP Phone 7960G/7940G Administration Guide for Cisco Unified Communications Manager 7.0 (SCCP)
OL-15498-01
Understanding the Cisco Unified IP Phones 7960G and 7940G, page 1-1
What Networking Protocols Are Used?, page 1-4
What Features are Supported on the Cisco Unified IP Phones 7960G and 7940G?, page 1-5
Understanding Security Features for Cisco Unified IP Phones, page 1-7
Overview of Configuring and Installing Cisco Unified IP Phones, page 1-12
shows the main components of the Cisco Unified IP Phone 7960G and
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C H A P T E R
Figure 1-2, shows the
1-1